Summary of Significant Accounting Policies - Cost of Products Sold (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2022 |
|
| Accounting Policies [Abstract] | |||
| Cost Of Goods Sold, Storage And Warehouse Costs | $ 335.0 | $ 263.2 | $ 204.0 |